File Formats Explained: PNG vs. SVG vs. PDF
A printer asks for your logo in “vector format” and you send a screenshot. A web developer asks for a PNG and you send a PDF. Neither mistake is about carelessness. It’s about four letters that sound interchangeable but do different jobs, and picking the wrong one costs time, money, or a print run that has to be redone.
The Core Distinction: Raster vs. Vector
Every file format on this list falls into one of two categories. Raster files (PNG, JPG) are built from a fixed grid of pixels, which means they lose quality when scaled up past their original size. Vector files (SVG, AI, and often PDF) are built from mathematical paths, which means they scale to any size, a business card or a billboard, without losing sharpness.
PNG
What it is: A raster image format that supports a transparent background.
Use it for: Web graphics, logos placed on colored backgrounds, and anything needing transparency without the file size of a PDF.
Avoid it for: Print materials or anything that needs resizing larger than its original dimensions, since it will blur or pixelate.
SVG
What it is: A vector image format built for the web, made of scalable paths instead of pixels.
Use it for: Logos and icons on a website, where the file needs to stay sharp at any size and load fast.
Avoid it for: Complex photographic images, since SVG works best for simple shapes and flat graphics, not photos.
What it is: A document format that preserves exact layout, fonts, and often vector quality across any device that opens it.
Use it for: Print-ready files, documents meant to be shared as-is, and anything a printer needs formatted precisely.
Avoid it for: Web use where a lighter, faster-loading format like PNG or SVG would serve the same purpose with less overhead.
AI (Adobe Illustrator File)
What it is: An editable vector source file, the master file a designer works from to make future changes.
Use it for: Archiving your logo’s original, editable version. Every logo project should include this file, even though you’ll rarely open it yourself.
Avoid it for: Sending to anyone without design software installed, since it won’t open in a standard image viewer.
Quick Reference: Which Format for Which Job
| Task | Best Format |
|---|---|
| Logo on a website | SVG |
| Logo on a colored background (email, social) | PNG |
| Sending a file to a printer | PDF (vector-based) or AI |
| Archiving your master logo file | AI |
| Sharing a formatted document |
Why Every Logo Project Needs All Four
A logo delivered as a single JPG limits what you can do with it later. A full delivery includes a vector source file (AI or EPS), a web-ready SVG, PNG versions for various uses, and a print-ready PDF, covering every situation without needing to go back to a designer for a resize or a different format. This breakdown of logo design cost covers what a properly scoped logo project includes, file delivery among it.
Where to Keep Track of These Files
Once you have the full set, store them somewhere findable, alongside your brand colors and fonts, not scattered across old email threads. This explanation of what a brand style guide covers recommends keeping every format organized in one place, so a vendor request for “the vector file” doesn’t turn into a multi-day search.
Common File Format Mistakes
- Sending a JPG screenshot when a vector file was requested. A printer or developer asking for a vector file needs the AI, EPS, or SVG version, not a raster export.
- Using a PNG for large-format print. A logo that looks fine on screen can pixelate badly once printed at banner size from a low-resolution PNG.
- Losing the original AI file. Without it, resizing or editing a logo later means rebuilding it from scratch instead of opening the source file.
- Sending a PDF when a transparent PNG was needed. A PDF typically carries a white background, which breaks a design meant to sit on a colored section.
Frequently Asked Questions
What’s the difference between a vector file and a raster file?
Vector files (SVG, AI) are built from scalable math, so they stay sharp at any size. Raster files (PNG, JPG) are built from fixed pixels and lose quality when scaled up beyond their original resolution.
Which file format should I use for my website logo?
SVG for the sharpest result and smallest file size on most modern websites. PNG works as a reliable fallback if a specific tool or platform doesn’t support SVG uploads.
Do I need an AI file if I never open Adobe Illustrator?
Yes. Keep it archived even if you never open it yourself. It’s the file a future designer or printer will need if your logo ever requires an edit or an unusual resize.
Can a PDF be a vector file?
Often, yes. A PDF exported from vector design software preserves that vector quality, which is why PDFs work well for print. Not every PDF is vector-based though, so confirm with whoever created it if precision matters.
Sending the Right File the First Time
Knowing which format fits which situation saves a round trip with a designer, a printer, or a developer every time a file gets requested. Keep the full set, vector source, SVG, PNG, and PDF, organized somewhere you can find them, and you’ll rarely be stuck sending the wrong one again. File formats are one entry in a wider set of terms worth knowing on purpose. This plain-English glossary of design terms covers the rest, from color systems to layout principles, in the same practical way.
If your logo or brand assets are missing pieces from this set, take a look at my branding and visual identity services, or get in touch to get a complete file package built out properly.
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